Terrapin

Terrapin is the muscle of the April Moon Gang. When activating his servo motor upgrades, a steel layering covers his body and makes him an invincible juggernaut. He is invulnerable to nearly anything and can also use the layering as an offensive advantage. However, there is some immobility and a more agile fighter can use Terrapin's strength as a weakness. Terrapin, along with Knux and Kneejerk, were dismantled by Batman when he realized the voice command for a secret failsafe located on the servo motors.